My wizard is planing on using the Wall of Stone spells alongside the druid to create walls. We planned on creating a 1ft. thick layer wall by placing two 10 by 10 wall panels together. As we're about to do this the thought came to my wizard about the spell Disintegrate and a section of it's text here: "This spell automatically disintegrates a Large or smaller non magical object or a creation of magical force. If the target is a Huge or larger object or creation of force, this spell disintegrates a 10-foot-cube portion of it." These panels would be considered large as they are 10 foot long by 10 foot tall by 6 inches thick, but would the spell disintegrate both front and back panels or would it treat each as a different object and only target the first? If the former is true then what if the panels are spaced apart by an inch?